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Finding the Fourth Proportional to 223,563.79, 308,561.84 and 128,134.45

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Solution

The fourth proportional to 223,563.79, 308,561.84 and 128,134.45 is: 176,850.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,563.79 : 308,561.84 = 128,134.45 : x
  2. Step 2: Convert to fraction form
    223,563.79/308,561.84 = 128,134.45/x
  3. Step 3: Cross multiply
    223,563.79x = 308,561.84 × 128,134.45
  4. Step 4: Simplify right side
    223,563.79x = 39,537,401,659.39
  5. Step 5: Solve for x
    x = 39,537,401,659.39/223,563.79
  6. Step 6: Final answer
    x = 176,850.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.